问题：
I'd like to have my Bootstrap menu automatically drop down on hover, rather than having to click the menu title. 我想让我的Bootstrap菜单在悬停时自动下拉，而不必单击菜单标题。 I'd also like to lose the little arrows next to the menu titles. 我还想丢失菜单标题旁边的小箭头。
解决方案：
参考一： https://stackoom.com/question/bFa5/如何在悬停而不是单击时使Twitter-Bootstrap菜单下拉列表参考二： https://oldbug.net/q/bFa5/How-to-make-Twitter-Bootstrap-menu-dropdown-on-hover-rather-than-click
来源：oschina
链接：https://my.oschina.net/u/4428122/blog/4311419